Mechanochemical solid state synthesis of copper(I)/NHC complexes with K₃PO₄

• Ina Remy-Speckmann,
• Birte M. Zimmermann,
• Mahadeb Gorai,
• Martin Lerch and
• Johannes F. Teichert

Beilstein J. Org. Chem. 2023, 19, 440–447, doi:10.3762/bjoc.19.34

• the standard reactions for catalytic hydrogenations with copper(I)/NHC complexes [4]. In this vein, we tested complex 5 from solid and liquid phase synthesis in the catalytic hydrogenation of esters, carbonyl compounds and in the semihydrogenation of alkynes. In the catalytic hydrogenation of ethyl

• benzoate (8) lower overall conversion to benzyl alcohol (9) and lower yield was found with 5bm (65% conv. and 53% yield with 5bm, in comparison to 100% conv. and 80% yield with 5ls; Scheme 3a). We hypothesize that the higher amount of CH2Cl2 as part of the prepared complex, which is not a suitable solvent

Volatiles from three genome sequenced fungi from the genus Aspergillus

• Jeroen S. Dickschat,
• Ersin Celik and
• Nelson L. Brock

Beilstein J. Org. Chem. 2018, 14, 900–910, doi:10.3762/bjoc.14.77

• esters were ethyl 2-methylbutyrate (27) and ethyl 3-methylbutyrate (28), and the aromatic esters ethyl benzoate (42) and ethyl phenylacetate (43). The esters 27 and 28 were reported previously from an Aspergillus parasiticus knockout mutant of the global regulator VeA, but not from the wildtype [20

One-pot odourless synthesis of thioesters via in situ generation of thiobenzoic acids using benzoic anhydrides and thiourea

• Mohammad Abbasi and
• Reza Khalifeh

Beilstein J. Org. Chem. 2015, 11, 1265–1273, doi:10.3762/bjoc.11.141

• with basic aqueous solutions, a complex mixture of unidentified products was obtained in all experiments. The similar experiments with ethyl acetate and ethyl benzoate did not lead to the formation of any product and the substrates were intact under all experimental conditions tested. Next, a possible

Streptopyridines, volatile pyridine alkaloids produced by Streptomyces sp. FORM5

• Ulrike Groenhagen,
• Michael Maczka,
• Jeroen S. Dickschat and
• Stefan Schulz

Beilstein J. Org. Chem. 2014, 10, 1421–1432, doi:10.3762/bjoc.10.146

• bacteria were present in trace amounts: 5-hepten-2-one (43), 2-acetylfuran (45), 3-octanone (48), nonanal (54), decanal (55), 1-phenyl-2-propanone (57), 1-phenyl-1,2-propandione (59), benzaldehyde (46), methyl benzoate (51), 2-phenylethanol (56), 1-phenyl-2-propanol (58), ethyl benzoate (52), and methyl 2

Presence or absence of a novel charge-transfer complex in the base-catalyzed hydrolysis of N-ethylbenzamide or ethyl benzoate

• Shinichi Yamabe,
• Wei Guan and
• Shigeyoshi Sakaki

Beilstein J. Org. Chem. 2013, 9, 185–196, doi:10.3762/bjoc.9.22

• )–X–Et [X = O (ethyl benzoate) and X = NH (N-ethylbenzamide)], were traced by DFT calculations. To simulate bond interchanges accompanied by proton transfers, a cluster model of Ph–C(=O)–X–Et + OH−(H2O)16 was employed. For X = O, three elementary processes and for X = NH four ones were obtained. The

• minimal model of TS1 was proposed and was found to be insensitive to n. Keywords: basic hydrolyses; DFT calculations; ethyl benzoate; N-ethylbenzamide; reactive intermediates; transition states; Introduction Basic hydrolyses of esters and amides have been extensively studied experimentally [1]. Use of

• calculations were carried out to shed light on the five points above, 1–5. As isoelectronic substrates, ethyl benzoate and N-ethylbenzamide were employed, of which the reactions are shown in Scheme 3. The former (ester) reaction has been studied well and its activation energy was reported to be 14.6 kcal/mol

The volatiles of pathogenic and nonpathogenic mycobacteria and related bacteria

• Thorben Nawrath,
• Georgies F. Mgode,
• Bart Weetjens,
• Stefan H. E. Kaufmann and
• Stefan Schulz

Beilstein J. Org. Chem. 2012, 8, 290–299, doi:10.3762/bjoc.8.31

• compounds are listed in Table 1. In addition to previously reported compounds 1–4 [9], several new volatiles were identified, predominantly aromatic compounds, such as 4-methylanisole (5), methyl salicylate (6), methyl 2-aminobenzoate (7), and methyl and ethyl benzoate (8 and 9), as well as fatty-acid